use conda-index, disable questionable test

[DerThorsten]

No description provided.

[DerThorsten]

This PR remove some tests with a questionable logic.

These tests more or less look like

@pytest.mark.timeout(1)
def test_it(
# .. some fixtures here
)
  p = Process(target=cli.app, args=(["start", config_dir, "--port", "8001"],))
  with Interrupt():
        p.start()
  p.join()
  assert p.exitcode == 0

The implementation of the Interrupt context is:

class Interrupt:
    # Interrupt child when SIGALRM is received.
    # Useful to kill the server when it is correctly launched, using a timeout.
    def _handle_interrupt(self, signum, frame):
        for p in active_children():
            p.terminate()
            p.join()

    def __enter__(self):
        signal.signal(signal.SIGALRM, self._handle_interrupt)

    def __exit__(self, exc_type, exc_val, exc_tb):
        pass

So first thing to notice is that the Interrupt context manager is not meaningful since the exit method does nothing.
A call to function like install_children_interruptor would do the same

def install_children_interruptor():
    def _handle_interrupt(self, signum, frame):
        for p in active_children():
            p.terminate()
            p.join()
    signal.signal(signal.SIGALRM, _handle_interrupt)

install_children_interruptor()

But ignoring this, I think the logic of the test might have been:

• the test times out
• This may fires SIGALRM since @pytest.mark.timeout(1) is used
• This should trigger the installed signal handler
• This should terminate the thread
• We finally test if the process (which runs the server) was exited gracefully with an exit-code of 0

But long story short, these tests time out in the CI.
Given their somewhat complicated logic/flow, and how little they test, I suggest we remove them.